Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 2138-2157 of 9902
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DRLMA: An Intelligent Move Acceptance for Combinatorial Optimization Problems based on Deep Reinforcement Learning
(Master thesis, 2023-07-01)Numerous heuristic solution methods have been developed to tackle combinatorial opti- mization problems, often customized for specific problem domains and use-cases where they exhibit remarkable performance. However, their ... -
Drum Analysis
(Master thesis, 2002)This thesis studies drumloops, and the possibility to separate the different drumsounds from each other. Drum onsets and the detection of these are thoroughly discussed. Different approaches for detection and separation ... -
Drumlin relief
(Peer reviewed; Journal article, 2012)Drumlin relief is a key parameter for testing predictions of models of drumlin formation. Although this metric is commonly described in textbooks as being of the order of a fewtens ofmetres, our critical review of the ... -
Dual lidar wind measurements along an upstream horizontal line perpendicular to a suspension bridge
(Journal article; Peer reviewed, 2021)Remote wind sensing can complement traditional anemometry at a bridge site and contribute to an improved wind-resistant design of long-span bridges. This study examines wind lidar measurement data recorded along a ... -
Dual staining with CFDA-AM and SYTOX Blue in flow cytometry analysis of UV-irradiated Tetraselmis suecica to evaluate vitality
(Peer reviewed; Journal article, 2016)After disinfection of ballast water, it is crucial to detect organisms and determine their vitality to assess the performance of the chosen treatment technique. Ultraviolet (UV) irradiation is a treatment technology commonly ... -
Dual virtual element methods for discrete fracture matrix models
(Peer reviewed; Journal article, 2019)The accurate description of fluid flow and transport in fractured porous media is of paramount importance to capture the macroscopic behavior of an oil reservoir, a geothermal system, or a CO2 sequestration site, to name ... -
Dual-Lobe Reconnection and Horse-Collar Auroras
(Journal article; Peer reviewed, 2020)We propose a mechanism for the formation of the horse-collar auroral configuration during periods of strongly northward interplanetary magnetic field (IMF), invoking the action of dual-lobe reconnection (DLR). Auroral ... -
Dualgraden til noen determinentelle varieteter
(Master thesis, 2008) -
Duration of the parasitic phase determines subsequent performance in juvenile freshwater pearl mussels (Margaritifera margaritifera)
(Peer reviewed; Journal article, 2017-03)Host–parasite systems have been useful in understanding coevolutionary patterns in sympatric species. Based on the exceptional interaction of the long‐lived and highly host‐specific freshwater pearl mussel (FPM; Margaritifera ... -
Dying for change: A roadmap to refine the fish acute toxicity test after 40 years of applying a lethal endpoint
(Journal article; Peer reviewed, 2021)The fish acute toxicity test (TG203; OECD, 2019) is frequently used and highly embedded in hazard and risk assessment globally. The test estimates the concentration of a chemical that kills 50% of the fish (LC50) over a ... -
Dying from the lesser of three evils: facilitation and non-consumptive effects emerge in a model with multiple predators
(Peer reviewed; Journal article, 2019)Prey modify their behaviour to avoid predation, but dilemmas arise when predators vary in hunting style. Behaviours that successfully evade one predator sometimes facilitate exposure to another predator, forcing the prey ... -
The dynamic and thermodynamic structure of monsoon low-pressure systems during extreme rainfall events
(Peer reviewed; Journal article, 2015-08-12)A cyclone-tracking algorithm is used to identify monsoon low-pressure systems (LPS) in the ERA-interim re-analysis (1979–2010). The LPS that are connected to observed extreme rainfall events are picked out and studied with ... -
Dynamic Boolean modelling reveals the influence of energy supply on bacterial efflux pump expression
(Journal article; Peer reviewed, 2022)Antimicrobial resistance (AMR) is a global health issue. One key factor contributing to AMR is the ability of bacteria to export drugs through efflux pumps, which relies on the ATP-dependent expression and interaction of ... -
Dynamic Capillary Effects in the Simulation of Flow and Transport in Porous Media: A New Linearisation Method
(Master thesis, 2014-12-25)In this thesis mathematical models with and without dynamic capillary effects are developed to model water flow and solute transport through a porous medium. The system of equations are discretised using the finite volume ... -
Dynamic Content Manage for E-Learning
(Master thesis, 2008-11-18) -
Dynamic Content Manager for E-Learning
(Master thesis, 2008-11-18)Dynamic content manager for E-Learning project is developed as the partial fulfillment of master studies under the supervision of yngve lamo Ph.D and Khalid Azim Mughal Ph.D. -
Dynamic effects of restoring footpoint symmetry on closed magnetic field lines
(Peer reviewed; Journal article, 2016-05-05)Here we present an event where simultaneous global imaging of the aurora from both hemispheres reveals a large longitudinal shift of the nightside aurora of about 3 h, being the largest relative shift reported on from ... -
Dynamic Mode Decomposition and Koopman Operator (Data-Driven Modeling of Complex Dynamical Systems)
(Master thesis, 2019-06-19)Data-driven schemes are in high demand, given the growing abundance and accessibility to large amounts of measurements from historical records, numerical simulations, and experimental data. However, despite the abundance ... -
Dynamic modelling of biochemical reaction networks and sampling methods for constraint-based models
(Doctoral thesis, 2021-02-05)This dissertation is a partial fulfillment of the requirements for the degree of Doctor of Philosophy (PhD). This study is carried out at the Department of Mathematics, University of Bergen. The subject of the thesis is ... -
Dynamic Modelling of Squirrel Cage Induction Motors for Studying Motor Current Signature Analysis
(Master thesis, 2018-06-16)This study investigates dynamic modelling of induction motors with a variety of different defects and condition monitoring of these. The focus is directed at squirrel cage induction motors(SCIM) which is the most used ...